This chapter will list a number of potential
problems that may occur while operating
the crane. Most problems are easily solved
using the solutions portion of this chapter. If
problems persist, please contact Customer
Service at Stellar Industries 1-800-321-3741.
Prior to troubleshooting:
Always make sure the emergency brake is
engaged, the PTO is engaged (if equipped), and
the main power switch of the control panel inside
the cab is turned on.
To determine if there is an electrical or hydraulic
problem, first try to operate the crane manually.
This is done by turning the manual override knob
on the flow valve, then operating the individual
solenoid valves located along the valve bank. If
the crane operates, there will be an electrical
problem to trace. If the crane does not operate
using the manual overrides, there is a problem
within the hydraulic circuit.
Problem: Crane will not operate.
Solutions:
• Make sure that the parking brake is engaged.
• Make sure that the PTO is engaged.
• Make sure that there is 12V power going to the
radio receiver. If there is no power going to the
receiver, trace back to the power source and
check for a blown fuse or loose ground
connection. Refer to radio remote
troubleshooting guide at the end of this
chapter.
• Make sure that the transmitter batteries are fully
charged.
• Make sure that the hydraulic pump is operating
at its rated flow or GPMs. Check the flow by
using the flow meter to determine the GPMs. It
is possible that the hydraulic pump is getting
weak. If this is suspected, contact Stellar
Customer Service.
Problem: Crane will operate manually but will not
operate by radio remote.
Solutions:
• Make sure that there is 12V power going to the
radio receiver. If there is no power going to the
receiver, trace back to the power source and
check for a blown fuse or loose ground
connection. Refer to radio remote
troubleshooting guide at the end of this
chapter.
• Make sure that the parking brake is engaged.
• Make sure that the parking brake switch is
working properly. Check the parking brake
switch by performing a continuity test. If the
switch is defective, simply replace it.
Problem: Not all crane functions operate using the
radio remote transmitter or crane operates
intermittently.
Solutions:
• Make sure that the toggle switch is working
properly. If the switch is defective, simply
replace it.
• Make sure that there is power going to the
valve bank coil solenoid of the function that will
not operate. If no power is going to the coil
solenoid, check wiring connections on wire
harness plug connector for broken wires, loose
connection or poor crimp. If power is going to
the solenoid valve, it may not be opening to
allow hydraulic oil to the function that is not
operating. Remove stem valve, thoroughly
clean, lubricate, and reinstall valve. Do not
over tighten. If the valve will not close, simply
replace it.
Problem: Two functions operate at the same time
while only toggling one function.
Solutions:
• Make sure that the solenoid valves are all
latched in the center position to ensure that
they do not move while operating the crane.
• Determine the function that is operating on its
own. Check to see if there is power going to
the solenoid valve from a function that should
not be operating. If voltage is present at the
solenoid valve without operating the function,
the toggle switch has failed and is stuck in the
“on” function. If no voltage is present, the
solenoid valve may be partially open. Remove
the stem valve, thoroughly clean, lubricate,
and reinstall the valve. Do not over tighten. If
valve will not close, simply replace it.
Problem: Winch brake will not hold.
Solutions:
• Check to see if the back pressure on the return
line of the winch is greater than 50 psi. Try
operating a function other than the winch.
Operate the function both ways and then stop.
Troubleshooting
Chapter 4 - Troubleshooting
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